One of the business advantages of Unix systems is that they are flexible. Unlike Windows, which uses only a graphical user interface (GUI), Unix can be either a command-based system or a GUI. That means a Unix database administrator can execute detailed commands using scripts, which is usually his preference for an operating system. Most database administrators enjoy the command-based interface because it permits them to instantly execute a highly defined function, instead of wading through an embedded series of applications to do that function.
Unix is also flexible because it can be installed on various mainframes, microcomputers (personal computers), and supercomputers. Therefore, it can be uploaded for a huge variety of businesses, from corporations, government agencies, to scientific organizations. Moreover, Unix systems are generally more stable than Windows systems because they crash less often. Therefore, Unix database administrator jobs do not demand as much time trouble-shooting Unix systems and reconfiguring data. However, database administration jobs do require knowing how to diagnose a database-related problem and efficiently resolve it.
The most commonly used Unix database is the DB2 database put out by IBM. This database, now called DB2 9, requires fluency in Structured Query Language (SQL), the standard database language. This database is known for being more secure than Windows databases, such as Microsoft Access. For companies, this security is invaluable due to the high amounts of confidential information stored onto their computers. The DB2 9 database, first of all, has high access control, preventing unapproved users from accessing and possibly corrupting data. Moreover, this database has advanced back-up capabilities to ensure data protection and integrity. Most database administrators spend a great deal of time checking their backups to ensure everything is in working order and that the data has retained its integrity.
Like other database systems, DB2 9 implements tables, workspaces, and other organizational tools to structure large amounts of data. DB2 9 also has indexes that enable fast retrieval of data. Since Unix has a command-interface, DB2 9 requires the administrator to type in commands to make the system to bring up files. Being a Unix administrator also means knowing the difference between ''shell'' programs and ''kernel'' programs. For instance, while the kernel is the central component for most computer operating systems, the shell is a command interpreter specific to Unix systems.
Having this data organization is crucial for corporations and other large-scale operations that have millions of transactions per day. Data organization is so critical that if certain data, such as contracts, is lost, it may form the grounds for legal suits. Therefore, corporations create Unix database administrator jobs to launch DB2 9, upload company information onto it, and customize its layout to the company’s specifications.
DB2 9 is also the business standard because it is cheaper than Windows databases. Windows systems often require purchasing upgrades on a frequent basis, while Unix does not require them nearly as often. However, senior Unix administrators have purchasing authority to acquire any upgrades deemed necessary by upper management.
Besides setting up the initial database, Unix database administrators often add new network-centered functions. For example, they often install new workstations and user accounts, as well as train other managers on the database’s security procedures. Their supervision over both the Unix system and other workers varies depending on their seniority. Junior Unix administrators usually write system documentation and execute server commands, while working under the eye of a senior administrator. Senior administrators, however, spend more time overseeing junior administrators and training users in Unix. They can also write and execute more advanced shell scripts and system commands. Furthermore, they can also perform debugging and other major system repairs. Lastly, senior administrators often have graduate-level education that has instructed them in these more challenging skills.
Most junior to mid-level Unix administrators have bachelor’s degrees in computer science or database management. During college, they participate in internships since it is crucial for administrators to learn how to apply computer science to business or other professional endeavors.
Following graduation, many Unix administrators decide to earn certification in a Unix system to prove their high level of knowledge to employers. Most Unix administrators gain certification in either Unix or Linux, since Linux is equally commonplace at companies. However, if a Unix administrator wants to manage databases, he often chooses to gain certification in DB2 9 or the latest edition of DB2. Having this double certification will cement an employer’s trust in the administrator that he is adept with both the general Unix system and its most prevalent database.
Therefore, Unix administrators certified in both Unix and DB2 will be the front-runners for good entry-level database administration jobs.
Even database administrators who have worked less than one year earn extremely desirable salaries. Entry-level administrators earn about $50,000 for the first five years on the job. Mid-level administrators graduate to about $70,000 per year, while senior administrators rake in at least $80,000 per year with the strong potential to earn a six figure salary.
Database administration is now one of the highest areas of job growth. At the rate many companies are growing, they now require advanced databases to store various types of information and keep it all uniform. Therefore, database administrators are in huge demand and will probably remain so for the next ten years.
